Pneumatic-action construction.



C. H. THOMPSON.

PNEUMATIC ACTION CONSTRUCTION.

APPLICATION FILED APR. '14. 1908.

91 2,207. Patented Feb. 9, 1909.

UNITED STATES PATEN T OFFICE.

CLYDE I-I. THOMPSOX, OF MERIDEN, CONNECTICUT, ASSIGNOR TO THE 'ILCOX & WHITE COMPANY, OF MERIDEN, CONNECTICUT,

A CORPORATION OF CONNECTICUT.

PNEUMATIC-ACTION CONSTRUCTION.

Specification of Letters Patent.

Patented Feb. 9, 1909.

T 0 all whom it may concern."

Be it known that I, CLYDE H. Trronrrsov.

l practically eliminate this labor, heretofore regarded as essential, and to produce a fina citizen of the United States, residing at ished structure which shall possess the maxi- Meriden, New Haven county, State of Conmum of durability. To that end, in shaping necticut, have invented certain new and usethe valve-board sections, a suitable tool is full Improvements in Pneumatic-Action Conemployed to form an integral external ridge struction, of which the following is a full, extending across one or more of the ports, clear, and exact description. and as best. seen in Figs. 2 and For ex- My invention rclates to improvements in ample, in Fig. 2, the guide 7 is formed in- I pneumatic music playing instruments, the tegrally on the section 9 of the valve-board, 5 object being mainly to provide a superior while in Fig. 3 the guide 8 is formed invalve-board construct-ion at comparatively tegrally on the section 10. To form the valve small expense. chamber, port and guide passage, I employ a In the accompanying drawings, Figure 1 triple diameter cuttingbit and out into the is a sectional view of an action of a type to section 9. for example, to form, by the wvhich my invention -is' adapted; Fig. 2 is a greatest diameter of the hit, one section of plan view of the valveboard, broken away; the valve chamber; by the intermediate Fig. 3 is a similar view of the opposite side diameter of the bit, one port into the valve thereof; Fig. 4 is a sectional view of said chamber; and by the smallest diameter of valve-board on the line mm of Fig. 2. the bit, the passage through the guide 7 to It will not be necessary to describe at receive the stem 6. I then employ the same length the action mechanism proper, it being bit for the purpose of cutting out the section sufiicient to merely refer to the main parts 10 of the valve-board. In this instance, the of the same and to stat that th a ti n greatest diameter forms the balance of the selected forillustration herein is, in the main, alve chamber, the intermediate diameter of the wel'rkaown pneumatic type. forms the port for the valve 5, and the The action includes power pneumatics 1, S a e tdiameter forms the passage in the secondary pncumatics 2, primary pneumatics tegral gu de 8 to receive the stem 6. v By 3, ri valves 4, d secondary valves this construction it will be seen that a vast including th tw valv l t 5+5 i amount of labor is saved and at the same each set. The valve elements 5-5- are ca'rtime the guides 7 and 8, being formed inried upon a stem 6. One end of each valve t g a y t e g'u de hoard, remain a perstem 6 stands close to the back of its respecmiment p rt h e un nfiuencd by damptive pneumatic 2, so that when the latter is .IIQSS OrWeaiheI o d o s, t the injury of distend d it will v th t m 6 d hift the instrument. "While all this is due to the so the position of the valve elements 5-5=. In S mp e eifpedient of forming the guide strips Fig. 1, one set of these elements (the upperand ntegrally with the valve-board seemost.) is shown i th p iti i hi h th trons, it is a feature of distinct novelty and 1 port controlled by the element 5 is evened, of great a t ge.

and the port controlled by the elemen ti 5 is The Valve-hoard s pref rably formed as closed. The other set of valve elements (the w 0f the two e o s 9 nd 10. These lowermost) is shown in the opposite posisections may be secured together in any suittion, its corresponding pneumatic 2 being able manner to furnish an air-tight joint at collapsed. Each stem 6 is mounted nearits their me ng edges Screws 11-11 may be ends in the valve guid s 7 and 8, The e employed to guarantee a firm connection of guides are each located just outside -of the d part there eing Suflioient stock proports which the valve elements-55?* respec- V d in t material et n th adjacent tively control. Heretofore it has been the Val e Chambers to permit of the introduction practice to make these guide elements in the of such screws as shown in Fig. 4:. form of narrow stri s separate from the In the boring out of the two sections ef valve-board and glue or otherwise attach the valve-board,I preferably have the interthe same thereto. This involves not only mediate section of the cutting-bit extended much labor but this method of connection of ahead sufficiently far so that it will not only the said guides to the valve-board is not cut through the wall of the valve-board, but durable. The object of my invention is to will also slightly undercut each guide 7 and 8, as indicated at 12 (Fig.1), the purpose being to afford a free air passage.

The section 10 of the valve-boardis preferably quite deep so as to give a very long valve chamber, said chamber being preferably of a greater length than twice the diameter of the ports therein. I have found, by

this proportion, that the action is practically silent, Whereas practical experience demonstratesthat in a very short valve chamber, with bearings for the stem 6 comparatively close together, the operation of the valves is distinctly audible.

While I have shown the valve chamber extending partially into each section of the valve-board, for the sake of compactness, this is only a preferred construction, as the valve chamber might be formed wholly in the sechaving a port, a guide formed integrally on each section and arranged outside of and slightly away from the port in each of said.

sections respectively, a valve stem supported by said guides and passing longitudinally through said valve chamber, valve elements on said stem for closing said ports respectively and alternately.

2. In a pneumatic action, a Valve board including two sections and having'a valve chamber included partly within on? and partly within the other section, each section having a port, a guide on each section arranged outside ofand slightly away/from the port therein, one of said guides being formed integrally with, one of said sections, a valve stem supported by saidguides and passing longitudinally through the valve 'chamber,valve elements on said stem for closing said ports respectively and alternately. I CLYDE H. THOMPSON.

:Witnesses:

STANLEY B. WHITE, FRANK C. WHITE. 

